Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation (Details 4)

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Equity-Based Compensation (Details 4) - Antero Midstream Partners Phantom and Restricted Unit Awards
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 2015
USD ($)
$ / shares
shares
Number of units  
Total granted and unvested at the beginning of the period (in shares) | shares 2,381,440
Granted (in shares) | shares 12,057
Forfeited (in shares) | shares (51,860)
Total awarded and unvested at the end of the period (in shares) | shares 2,341,637
Weighted average grant date fair value  
Total granted and unvested at the beginning of the period (in dollars per share) $ 29.00
Granted (in dollars per share) 24.88
Forfeited (in dollars per share) 29.00
Total awarded and unvested at the end of the period (in dollars per share) $ 28.98
Aggregate intrinsic value  
Outstanding at the beginning of the period | $ $ 65,490
Outstanding at the end of the period | $ 41,822
Additional equity compensation to be recognized over the remaining period | $ $ 52,500
Weighted average period for recognizing unrecognized stock-based compensation expense 3 years 1 month 6 days